How do I select a row in a DataGrid and fire an onclick even from a button ie. 'edit row'

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WPF

DataGrid

I am working on a project that uses a datagrid I have a button to the right of my datagrid that I want to pull up and 'edit/detail' screen from the selected record the users have chosen. Is there an easy way to do this? I'm relatively new to .NET. Thanks in advance for all your comments!

On another note. Here is the code I'm using to populate my grid. I'm wondering if maybe I'm creating one total object (the grid itself) instead of objects in the grid (rows). This is also called in 'public mainWindow()'

private void FillDataGrid()
        {
            string ConString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
            string CmdString = string.Empty;
            using (SqlConnection con = new SqlConnection(ConString))
            {
                CmdString = "SELECT CJ96ORIG_AGCY, CJ96TCN, CJ96TCR, CJ96_STATUS, CJ96_FBI_NUM, CJ96NOTIFICATIONS_SENT FROM cj96TBRisc";
                SqlCommand cmd = new SqlCommand(CmdString, con);
                SqlDataAdapter sda = new SqlDataAdapter(cmd);
                DataTable dt = new DataTable("cj96");
                sda.Fill(dt);
                grdRISC.ItemsSource = dt.DefaultView;
            }
        }

Cheers!